build(deps): update dependency com.diffplug.spotless:spotless-plugin-gradle to v8.2.1

Author: renovate[bot]

gradle/libs.versions.toml

@@ -4,7 +4,7 @@
 
 [versions]
 shadow = "9.3.1"
-spotless = "8.1.0"
+spotless = "8.2.1"
 
 [libraries]
 shadowGradlePlugin = { module = "com.gradleup.shadow:shadow-gradle-plugin", version.ref = "shadow" }